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GCSE Combined Science · key term
The change of state from liquid to gas at the surface of a liquid.
Used by AQA and Edexcel
Specification 4.7.2.2, 5.7.1.2, 6.3.1.2 · Paper 2, Paper 4, Paper 5
The change of state from liquid water to water vapour.
The change of state from liquid to gas.
Specification States of matter · Paper 1, Paper 2, Paper 3, Paper 4
The change of liquid water into water vapour at a surface.
Revise: The water cycle and potable waterEnergy from the Sun drives evaporation from oceans, lakes, rivers and soil. Liquid water changes into water vapour, a gas, and enters the atmosphere. When seawater evaporates, dissolved salts remain behind: it is the water that enters the air.
The change from liquid to gas at the liquid's surface, which can occur below its boiling point.
Explain both evaporation and condensation, linked to the temperature gradient and different boiling points.
Name the state changes: evaporation is liquid water becoming water vapour; condensation is water vapour becoming liquid water.
Distinguish boiling throughout a liquid from evaporation at its surface.
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